a used EK quantum vector fe 3090 block with active back plate.this is the best 3090 block available, I am still currently running the same block 10/10could use a few replacement screws. this block was purchased as two used parts that had been previously run with color fluid that damaged the items. it has been disassembled,stripped screws replaced when available, cleaned, and finally reassembled and run water through as a minor leak check. item is missing LEDsthis has not had a 24 hour leak test done.(my personal recommendation is to replace the o-ring on front and back and add some silicone grease)